CN113772043B - Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover - Google Patents
Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover Download PDFInfo
- Publication number
- CN113772043B CN113772043B CN202111169599.8A CN202111169599A CN113772043B CN 113772043 B CN113772043 B CN 113772043B CN 202111169599 A CN202111169599 A CN 202111169599A CN 113772043 B CN113772043 B CN 113772043B
- Authority
- CN
- China
- Prior art keywords
- opening
- closing
- water tank
- cover plate
- locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
- B63B79/20—Monitoring properties or operating parameters of vessels in operation using models or simulation, e.g. statistical models or stochastic models
Abstract
The underwater opening and closing hatch cover suspended sediment simulation environment test system comprises a water tank, wherein a stirrer is installed on the top surface of the water tank, a propeller of the stirrer extends into the water tank, the water tank is filled with water and is provided with sediment, and sediment particles are suspended and distributed in the water tank by starting the stirrer under the action of the propeller; the water tank is internally provided with a cylinder body, the bottom of the cylinder body is provided with a cover plate in a matching way, the cover plate is connected with the opening and closing oscillating cylinder through a swing arm, a base of the opening and closing oscillating cylinder is arranged on the cylinder body, and the opening or closing action of the cover plate is realized by controlling the rotation of the opening and closing oscillating cylinder; a hole is formed in the center of the top of the cylinder body, a transition joint is mounted at the hole, and the transition joint is connected with a stop valve and an air compressor in series through a pipeline in sequence; a locking mechanism is also arranged in the cylinder body; the device runs under the condition of a platform of a test room, carries out the suspended sediment environment adaptability test of the underwater opening and closing hatch cover, and takes the airtight pressure value of the sealing ring as a test check index.
Description
Technical Field
The invention relates to the technical field of underwater opening and closing hatch covers, in particular to a system and a method for simulating an environment by suspended sediment of an underwater opening and closing hatch cover.
Background
With the continuous development of ocean engineering technology, the requirements of an underwater platform on a dry-wet conversion technology are increasingly improved, and the underwater opening and closing hatch cover is used as a key component of the dry-wet conversion cabin, and whether the function of the underwater opening and closing hatch cover is reliable or not directly determines whether a dry-wet conversion operation task can be smoothly completed or not.
Different from an ideal state, suspended sediment exists in seawater (particularly on the offshore bottom surface) in practical engineering application, suspended sediment inevitably enters a sealing surface of a hatch cover in the opening and closing processes of the hatch cover, if the sealing structure cannot adapt to the existence of sediment particles, sealing failure can be caused, and a dry-wet conversion operation process cannot be completed, so that the technical problem that the adaptive effect of the sealing structure for the underwater opening and closing hatch cover on the suspended sediment is required to be solved before engineering application is tested. The test of the adaptability of the suspended sediment environment for opening and closing the hatch cover underwater in the marine environment is the most intuitive, but the method of adopting the marine test not only brings a great deal of technical difficulty to the construction of a test system, but also needs a great deal of manpower, material resources and expense.
Disclosure of Invention
The applicant provides a simulation environment test system and a simulation environment test method for suspended sediment of an underwater opening and closing hatch cover, which are reasonable in structure, aiming at the defects in the prior art, so that the simulation environment test system and the simulation environment test method for suspended sediment of the underwater opening and closing hatch cover can operate under the condition of a platform of a laboratory, the environment adaptability test for the suspended sediment of the underwater opening and closing hatch cover can be carried out, and the airtight pressure value of a sealing ring is used as a test check index.
The technical scheme adopted by the invention is as follows:
a simulation environment test system for suspended silt of an underwater opening and closing hatch cover comprises a water tank, wherein a stirrer is installed on the top surface of the water tank, a propeller of the stirrer extends into the water tank, the water tank is filled with water and is provided with silt, and silt particles are suspended and distributed in the water tank by starting the stirrer under the action of the propeller;
a cylinder body is further arranged in the water tank, a cover plate is arranged at the bottom of the cylinder body in a matching mode, the cover plate is connected with the opening and closing swing cylinder through a swing arm, a base for opening and closing the swing cylinder is arranged on the cylinder body, and the opening or closing action of the cover plate is realized by controlling the rotation of the opening and closing swing cylinder;
a hole is formed in the center of the top of the cylinder body, a transition joint is mounted at the hole, and the transition joint is connected with a stop valve and an air compressor in series sequentially through a pipeline;
A locking mechanism is also arranged in the cylinder body;
the locking mechanism has the structure that:
including fixing two inboard sliding support at the apron, still including the axletree board that is located two sliding support, the axletree board is "ten" style of calligraphy structure, the locking swing jar is connected to the bottom of axletree board, and the locking swing jar is installed in the inboard central axis department of apron simultaneously, there is the connecting rod at the both ends of axletree board through the round pin hub connection respectively, the outside of connecting rod is through same round pin hub connection fitting pin, and the fitting pin is installed in sliding support's hole, and the fitting pin carries out rectilinear movement along sliding support.
The cover plate is provided with a groove, and a sealing ring is arranged in the groove.
And a pressure gauge is arranged on a pipeline between the transition joint and the stop valve and used for detecting the pressure on the inner side of the cover plate.
The sliding support is welded with the inner side face of the cover plate.
The cross section of the sliding support is of a T-shaped structure.
And a concave pit matched with the locking pin is arranged on the inner wall surface of the cylinder body.
A test method of an underwater open-close hatch cover suspended sediment simulation environment test system comprises the following operation methods:
the first step is as follows: adding water into the water tank and preparing silt;
The second step: starting a stirrer to enable silt particles to be suspended and distributed in the water tank;
the third step: starting a locking swing cylinder to work;
the fourth step: the locking swing cylinder is controlled to rotate, the locking pin is driven to be separated from the pit in the cylinder body, and the cover plate is unlocked;
the fifth step: the opening and closing swing cylinder is controlled to rotate, the cover plate is opened, and the uncovering state is kept;
and a sixth step: the time in the cover opening state is used for simulating the actual operation state, and the time in the cover plate state is closed and locked for simulating the complete working process of the hatch cover in the dry-wet conversion operation task;
the seventh step: driving the stirrer to stop working;
eighth step: after the water in the water tank is static, opening the stop valve, starting the air compressor, and closing the stop valve and stopping the air compressor when the reading of the pressure gauge reaches a preset value;
the ninth step: after the pressure is maintained for 30-60 minutes, observing whether the pressure value of the pressure gauge is reduced and whether bubbles emerge from the water tank, and judging whether the sealing ring of the cover plate is in good tightness;
the tenth step: according to the test operation flow, repeated cover plate opening and closing locking functions and tightness check tests are carried out for many times so as to verify the adaptability and reliability of the underwater opening and closing hatch cover in the suspended sediment environment.
The invention has the following beneficial effects:
the device has compact and reasonable structure and convenient operation, can simulate the opening, closing, locking and unlocking actions of the hatch cover in the environment by simulating the suspended sediment state of the marine environment of the dry-wet conversion cabin, and performs a sealing performance examination test on the hatch cover on the basis of the simulated opening, closing and locking actions of the hatch cover so as to test the adaptability and reliability of the underwater opening and closing hatch cover in the suspended sediment environment. The system can operate under the condition of a test platform, can simulate the proportion of suspended sediment in different ocean areas, and can carry out an environmental adaptability test and a long-term reliability examination test of the suspended sediment, thereby not only reducing the additional technical difficulty, but also greatly reducing the test cost compared with a direct sea test.
The invention is mainly used for simulating an underwater suspended silt environment and testing the sealing performance of the hatch cover after opening and closing in the environment, thereby supporting the engineering application of opening and closing the hatch cover underwater.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the locking mechanism of the present invention.
Wherein: 1. a water tank; 2. a stirrer; 3. a barrel; 4. a cover plate; 5. a locking mechanism; 6. a seal ring; 7. swinging arms; 8. opening and closing the swing cylinder; 9. a transition joint; 10. a pressure gauge; 11. a stop valve; 12. an air compressor;
501. A shaft plate; 502. locking the swing cylinder; 503. a sliding support; 504. a locking pin; 505. a connecting rod; 506. and (7) a pin shaft.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the system for simulating an environment by suspending silt in an underwater opening and closing hatch cover of the embodiment includes a water tank 1, a stirrer 2 is installed on the top surface of the water tank 1, a propeller of the stirrer 2 extends into the water tank 1, the water tank 1 is filled with water and is provided with silt, and the stirrer 2 is started to suspend silt particles in the water tank 1 under the action of the propeller;
the water tank 1 is also internally provided with a cylinder body 3, the bottom of the cylinder body 3 is provided with a cover plate 4 in a matching way, the cover plate 4 is connected with an opening and closing swing cylinder 8 through a swing arm 7, the base of the opening and closing swing cylinder 8 is arranged on the cylinder body 3, and the opening or closing action of the cover plate 4 is realized by controlling the rotation of the opening and closing swing cylinder 8;
a hole is formed in the center of the top of the cylinder 3, a transition joint 9 is installed at the hole, and the transition joint 9 is connected with a stop valve 11 and an air compressor 12 in series through a pipeline in sequence;
a locking mechanism 5 is also arranged in the cylinder 3;
the locking mechanism 5 has the structure that:
the locking mechanism comprises two sliding supports 503 fixed on the inner side of a cover plate 4, and further comprises a shaft plate 501 located on the two sliding supports 503, wherein the shaft plate 501 is of a cross-shaped structure, the bottom of the shaft plate 501 is connected with a locking swing cylinder 502, the locking swing cylinder 502 is installed on the central axis of the inner side of the cover plate 4, two ends of the shaft plate 501 are respectively connected with a connecting rod 505 through a pin shaft 506, the outer side of the connecting rod 505 is connected with a locking pin 504 through the same pin shaft 506, the locking pin 504 is installed in the inner hole of the sliding support 503, and the locking pin 504 moves linearly along the sliding supports 503.
The cover plate 4 is provided with a groove, and a sealing ring 6 is arranged in the groove.
And a pressure gauge 10 is arranged on a pipeline between the transition joint 9 and the stop valve 11, and the pressure gauge 10 detects the pressure on the inner side of the cover plate 4.
The sliding support 503 is welded to the inner side of the cover plate 4.
The cross section of the sliding support 503 is in a T-shaped structure.
The inner wall surface of the cylinder 3 is provided with a recess that engages with the locking pin 504.
The test method of the underwater open-close hatch cover suspended sediment simulation environment test system comprises the following operation methods:
the first step is as follows: adding water into the water tank 1 and preparing silt;
the second step is that: starting the stirrer 2 to enable the silt particles to be suspended and distributed in the water tank 1;
the third step: starting the locking swing cylinder 502 to work;
the fourth step: the locking swing cylinder 502 is controlled to rotate, the locking pin 504 is driven to be separated from the pit in the cylinder body 3, and the cover plate 4 is unlocked;
the fifth step: the opening and closing swing cylinder 8 is controlled to rotate, the cover plate 4 is opened, and the uncovering state is kept;
and a sixth step: the time in the state of opening the cover is used for simulating the actual operation state, and the time in the state of closing and locking the cover plate 4 is used for simulating the complete working process of the hatch cover in the dry-wet conversion operation task;
the seventh step: driving the stirrer 2 to stop working;
The eighth step: after the water in the water tank 1 is static, opening the stop valve 11, starting the air compressor 12, and when the reading of the pressure gauge 10 reaches a preset value, closing the stop valve 11 and stopping the air compressor 12;
the ninth step: after the pressure is maintained for 30-60 minutes, whether the pressure value of the pressure gauge 10 is reduced and whether bubbles emerge from the water tank 1 is observed, so that whether the sealing ring 6 of the cover plate 4 is intact is judged;
the tenth step: according to the test operation flow, repeated opening and closing locking functions and tightness check tests of the cover plate 4 are carried out for many times so as to verify the adaptability and reliability of the underwater opening and closing hatch cover in the suspended sediment environment.
The main structure and function of the invention are as follows:
mainly comprises a water tank 1, a stirrer 2, a cylinder 3, a cover plate 4, a locking mechanism 5, a sealing ring 6, a swing arm 7, an opening and closing swing cylinder 8, a transition joint 9, a pressure gauge 10, a stop valve 11 and an air compressor 12,
the locking mechanism 5 comprises a shaft plate 501, a locking swing cylinder 502, a sliding support 503, a locking pin 504, a connecting rod 505 and a pin 506.
The stirrer 2 is arranged at the top of the water tank 1, the water tank 1 is filled with water and is provided with a certain amount of silt according to the proportion requirement, and the stirrer 2 is started to suspend and distribute silt particles in the water tank 1 under the action of the propeller;
The cylinder body 3 is arranged in the water tank 1, the cover plate 4 is connected with the opening and closing swing cylinder 8 through the swing arm 7, the sealing ring 6 is arranged in a groove of the cover plate 4, the base of the opening and closing swing cylinder 8 is arranged on the cylinder body 3, and the opening or closing action of the hatch cover can be realized by controlling the rotation of the opening and closing swing cylinder 8; the transition joint 9 is installed at an opening at the top of the cylinder 3, is connected with the stop valve 11 and the air compressor 12 sequentially through a pipeline, and a pressure gauge 10 is installed on the pipeline between the transition joint 9 and the stop valve 11 and used for detecting the pressure on the inner side of the cover plate 4.
The sliding support 503 is welded with the inner side of the cover plate 4, the locking swing cylinder 502 is installed at the inner axis of the cover plate 4, and the shaft outlet end of the locking swing cylinder 502 is fixedly connected with the locking shaft plate 501; the locking pin 504 is arranged in an inner hole of the sliding support 503, and the locking pin 504 can move linearly along the sliding support 503, when the locking pin 504 extends into the pit of the cylinder 3, the locking action of the cover plate 4 is realized, and when the locking pin 504 retracts, the unlocking action is realized; one end of a connecting rod 505 is hinged with the locking shaft plate 501 through a pin shaft 506, and the other end of the connecting rod is hinged with a locking pin 504 through the pin shaft 506; the locking swing cylinder 502 is controlled to rotate forward and backward to realize the reciprocating directional movement of the locking pin 504, so that the locking and unlocking actions of the cover plate 4 are completed.
In the actual working process:
starting the stirrer 2, controlling the locking swing cylinder 502 to rotate and unlock the cover plate 4 after silt particles are suspended and distributed in the water tank 1, controlling the opening and closing swing cylinder 8 to rotate and open the cover plate 4, keeping the cover opening state for a certain time to simulate the actual operation state, and closing and locking the cover plate 4.
Stopping the stirrer 2, starting the stop valve 11 and starting the air compressor 12 after the water in the water tank 1 is static, and closing the stop valve 11 and stopping the air compressor 12 when the reading of the pressure gauge 10 reaches a preset value. And after the pressure is maintained for a certain time, observing whether the pressure value of the pressure gauge 10 is reduced and whether bubbles emerge from the water tank 1, and judging whether the sealing ring 6 of the cover plate 4 is in good tightness.
According to the test operation flow, repeated opening and closing locking functions and tightness check tests of the cover plate 4 are carried out for many times so as to verify the adaptability and reliability of the underwater opening and closing hatch cover in the suspended sediment environment.
The above description is intended to be illustrative, and not restrictive, the scope of the invention being indicated by the claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides an open and close hatch board suspension silt simulation environment test system under water which characterized in that: the water tank is characterized by comprising a water tank (1), wherein a stirrer (2) is installed on the top surface of the water tank (1), a propeller of the stirrer (2) extends into the water tank (1), the water tank (1) is filled with water and is provided with silt, and the stirrer (2) is started to enable silt particles to be suspended and distributed in the water tank (1) under the action of the propeller;
a cylinder body (3) is further installed inside the water tank (1), a cover plate (4) is installed at the bottom of the cylinder body (3) in a matched mode, the cover plate (4) is connected with an opening and closing swinging cylinder (8) through a swinging arm (7), a base of the opening and closing swinging cylinder (8) is installed on the cylinder body (3), and opening or closing of the cover plate (4) is achieved by controlling rotation of the opening and closing swinging cylinder (8);
a hole is formed in the center of the top of the cylinder body (3), a transition joint (9) is installed at the hole, and the transition joint (9) is sequentially connected with a stop valve (11) and an air compressor (12) in series through a pipeline;
a locking mechanism (5) is also arranged in the cylinder body (3);
the locking mechanism (5) has the structure that:
the locking device comprises two sliding supports (503) fixed on the inner side of a cover plate (4), and further comprises a shaft plate (501) located between the two sliding supports (503), wherein the shaft plate (501) is of a cross-shaped structure, the bottom of the shaft plate (501) is connected with a locking swing cylinder (502), the locking swing cylinder (502) is installed on the central axis of the inner side of the cover plate (4), two ends of the shaft plate (501) are respectively connected with connecting rods (505) through pin shafts (506), the outer sides of the connecting rods (505) are connected with locking pins (504) through the same pin shafts (506), the locking pins (504) are installed in inner holes of the sliding supports (503), and the locking pins (504) move linearly along the sliding supports (503);
The inner wall surface of the cylinder body (3) is provided with a concave pit matched with the locking pin (504).
2. The underwater opening and closing hatch cover suspended sediment simulation environment test system of claim 1, characterized in that: a groove is formed in the cover plate (4), and a sealing ring (6) is installed in the groove.
3. The underwater opening and closing hatch cover suspended sediment simulation environment test system of claim 1, characterized in that: and a pressure gauge (10) is arranged on a pipeline between the transition joint (9) and the stop valve (11), and the pressure gauge (10) detects the pressure on the inner side of the cover plate (4).
4. The underwater opening and closing hatch cover suspended sediment simulation environment test system of claim 1, characterized in that: the sliding support (503) is welded with the inner side surface of the cover plate (4).
5. The underwater opening and closing hatch cover suspended sediment simulation environment test system of claim 1, characterized in that: the cross section of the sliding support (503) is in a T-shaped structure.
6. A test method of the test system for simulating the environment by using the suspended sediment of the underwater opening and closing hatch cover of claim 1 is characterized in that: the method comprises the following steps:
the first step is as follows: adding water into the water tank (1) and preparing silt;
The second step: starting the stirrer (2) to enable silt particles to be suspended and distributed in the water tank (1);
the third step: starting a locking swing cylinder (502) to work;
the fourth step: the locking swing cylinder (502) is controlled to rotate, the locking pin (504) is driven to be separated from the pit in the cylinder body (3), and the cover plate (4) is unlocked;
the fifth step: the opening and closing swing cylinder (8) is controlled to rotate, the cover plate (4) is opened, and the opening state is kept;
and a sixth step: the time in the uncapping state is used for simulating the actual operation state, and the time in the state of closing and locking the cover plate (4) is used for simulating the complete working process of the hatch cover in the dry-wet conversion operation task;
the seventh step: driving the stirrer (2) to stop working;
eighth step: after water in the water tank (1) is static, the stop valve (11) is opened, the air compressor (12) is started, and when the reading of the pressure gauge (10) reaches a preset value, the stop valve (11) is closed and the air compressor (12) is stopped;
the ninth step: after the pressure is maintained for 30-60 minutes, observing whether the pressure value of the pressure gauge (10) is reduced and whether bubbles emerge from the water tank (1) or not, and judging whether the tightness of the sealing ring (6) of the cover plate (4) is intact or not;
the tenth step: according to the test operation flow, repeated opening and closing locking functions and tightness check tests of the cover plate (4) are carried out for many times so as to verify the adaptability and reliability of the underwater opening and closing hatch cover in the suspended sediment simulation environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111169599.8A CN113772043B (en) | 2021-10-08 | 2021-10-08 | Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111169599.8A CN113772043B (en) | 2021-10-08 | 2021-10-08 | Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113772043A CN113772043A (en) | 2021-12-10 |
| CN113772043B true CN113772043B (en) | 2022-06-28 |
Family
ID=78854738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111169599.8A Active CN113772043B (en) | 2021-10-08 | 2021-10-08 | Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113772043B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013114512A1 (en) * | 2012-02-03 | 2013-08-08 | Ｎｅｃソフト株式会社 | Operation support system, operation support device, operation support method and program |
| CN203572675U (en) * | 2013-12-02 | 2014-04-30 | 成都欧迅海洋工程装备科技有限公司 | Deep water simulation hyperbaric cabin and supporting device thereof |
| CN103754324A (en) * | 2013-07-03 | 2014-04-30 | 天长市航海船舶设备有限公司 | Sealed hatch cover |
| CN203981363U (en) * | 2014-06-16 | 2014-12-03 | 长沙金虹水工机械厂 | A kind of gate checkout equipment of simulating actual waterpower environment |
| KR20190043908A (en) * | 2017-10-19 | 2019-04-29 | 삼성중공업 주식회사 | Watertight door for testing leak |
-
2021
- 2021-10-08 CN CN202111169599.8A patent/CN113772043B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013114512A1 (en) * | 2012-02-03 | 2013-08-08 | Ｎｅｃソフト株式会社 | Operation support system, operation support device, operation support method and program |
| CN103754324A (en) * | 2013-07-03 | 2014-04-30 | 天长市航海船舶设备有限公司 | Sealed hatch cover |
| CN203572675U (en) * | 2013-12-02 | 2014-04-30 | 成都欧迅海洋工程装备科技有限公司 | Deep water simulation hyperbaric cabin and supporting device thereof |
| CN203981363U (en) * | 2014-06-16 | 2014-12-03 | 长沙金虹水工机械厂 | A kind of gate checkout equipment of simulating actual waterpower environment |
| KR20190043908A (en) * | 2017-10-19 | 2019-04-29 | 삼성중공업 주식회사 | Watertight door for testing leak |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113772043A (en) | 2021-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110132499B (en) | Method for testing reliability of bidirectional dynamic seal of deep sea valve rod | |
| CN103743633B (en) | Fluid structure interaction coal rock shear-seepage test device | |
| CN110095301B (en) | FPSO upper module model test method under simulated extreme sea condition | |
| CN109507051B (en) | Multifunctional deepwater flexible high-pressure cabin | |
| CN202533247U (en) | Apparatus for testing durability of cylinder valve | |
| CN211262637U (en) | Test system for detection equipment in pipeline | |
| CN110220652A (en) | Deep-sea gate valve seat sealing reliability dynamic simulant test device | |
| CN113772043B (en) | Simulation environment test system and test method for suspended sediment of underwater opening and closing hatch cover | |
| CN105929049A (en) | Universal portable calibration apparatus for on-line monitor used for gas dissolved in oil | |
| CN202420782U (en) | Device for testing tightness of sectional fillet weld | |
| CN109520723A (en) | Underwater gate valve load simulating device and underwater gate valve executing agency test method | |
| CN208594829U (en) | A kind of fast opening and closing device of deep water analog machine | |
| CN207335704U (en) | A kind of hydrologic parameter measuring device that can be recycled automatically | |
| CN208239264U (en) | It is a kind of for studying the experimental rig of soil particle Erosion Law | |
| CN211374166U (en) | Water quality testing sampling device | |
| CN206540670U (en) | Urea pipe tightness measuring device in automobile sensor | |
| CN210005182U (en) | Dynamic simulation testing device for sealing reliability of valve seat of deep sea gate valve | |
| CN106097862B (en) | A kind of coal and rock under adjustable artesian water pressure stabilization function infiltrates simple experimental device | |
| CN115032373A (en) | Testing device and testing method for repairing effect of underwater microorganism self-healing concrete crack | |
| CN112814039A (en) | City utility tunnel square well lid of fleing for one's life | |
| CN107478399A (en) | A kind of method that pressure testing is carried out to row's side of a ship outer tube | |
| CN113945471A (en) | Concrete washout test device under load and environment coupling effect | |
| CN220231327U (en) | Deep sea simulator | |
| CN202074960U (en) | Floating ball valve seat testing device | |
| CN110376016A (en) | Sampler and sampling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |